Automatic pump



atto: 119,14 1

W. J. SMITH `AUTOMATIC PUMP Filed May 20, 1924 I9 Y, rhummwm# Feb. 17, 1925a Patented Feb. 17, 19275.

Nireo WILLIAM J'. SMITH, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR T0 EDWARD BOARD, TRUSTEE, 'F PHILADELPHIA, PENNSYLVANIA.

AUTOMATIC PUMP.

Application tiled. May 20, 1924. Serial No. 714,620.

To all whom t may concern.'

Be it known that I, WILLIAM J. SMrri-i, a citizen of the United States, residing at Philadelphia, yin the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Automatic Pumps, of which the following is a specification.

This invention pumps.

The object of the invention is to provide an automatic pump in the operation of which aquantity of water admitted at a low pressure shall raise a portion of the water to a higher pressure.

The invention in its simplest form consists of two or more cylinders and pistons, means for admitting and discharging water alternately to and from the sides of the pistons, and means whereby the combined force exerted by the pistons is utilized to raise the pressure of water on one side of one or more pistons. l

In the drawing I have shown in Figure 1 a central vertical sectional View of a pump constructed in accordance with the invention.

Figure 2 is a fragmentary view, partly Vin section` particularly showing the positions of the arts `when the pistons have moved to their extreme left positions, the

right detent has been raised'from the collar on the .valve stem, and the valve is about to be shifted by the action of the compressed spring on the valve rod. Figure 3 is a central horizontal sectional view of the valve and valve casing.

In this drawing l represents a cylinder and 2 represents a piston, which has attached toit a piston rod 3 extending from the faces of thepiston, the respective ends of the rod extending through stutling boxes 4 in the ends of the cylinder. The ends of the piston rod 3 are each rigidly attached to a. yoke 5, as by pins 6. Arranged adjacent to, preferablybelow, the cylinder 1 is a second cylinder 7 having a piston 8 and a so obtained to raise the relates to automatic j -of water supply, for instance, to a', water than that of the cylinder 7, in order that the power, obtained by imposing the force of water under pressure upon the pistons of both the cylinders, and utilizing the power ressure of the water on one end of the cylinder 7, may be as great as may be required.' Obviously, the relative sizes of the cylinders ma be changed at will, in order to obtain, within certain limits, any power desired.

Located adjacent to the cylinder 1, for instance, above itas herein shownn is a slide valve 10 having disk heads 33, 34E spaced apart, by means of which water is alternately admitted. to and discharged from the respective ends et the cylinder l and, is admitted, through valves located between-the cylinders, alternately to the respective ends of the cylinder 7 i The v alve is located in a casing 11, having an inlet port 12 connected to a source main of a city, which, is usually under ten to twelve pounds pressure to the square inch. The casing has `in it two outlet openings 13, through which, as will vbe hereinafter described, water, after being utilized to operate the piston of the cylinder l, yis discharged into a chamber 13 and thence through a discharge opening 132 from the pump. The valve casing is provided with portslt, 14, whichicommunicate through` passages 15, 15 with' ports 16, 16 located near the respective ends of the cylinder 1.

Extending from each lside of the valve 10 is a valve stem 17 the ends of which each project through and freely slide in an opening in one o the yokes 5, The valve rod has secured to it, at points between the valve casing and the yokes,the collars 1S, whose faces are gradually inclined upwardl from their outer to their inner portions, the 95 inclines 18 terminatin at` their junctures with the abruptly inc ined inner portions 19 of the faces. Extending from each'side of the valve casing is a .bracket 20 having therein a socket receiving la detent 21 hav- 100 ing a conical end 22 and yieldingly held in.r position by a spring 23. The body of the' detent is hollow to yreceive the spring, and bearing on the spring is an adjusting screw 23 by whichthe .tension ofthe s ring may be governed. The spring-held' etents are so disposed as to be in the paths of movements of the collars 18, and to contact with the inclined surfaces of the collars as the valve stem reci rocates.

Each end o the valve stem has on it a s ring 24 interposed between collars 13 and tiie inner faces of the yokes 5, the springs being alternately put under compresslon in the reciprocation of the pistons of the cylinders by contact with the collars.

Each end of the c linder 1 communicates through orts 26 an passages 27 with ports 28 locate one near each end of the cylinder 7. In each passage 27 isa check valve 29y so formed and disposed as to permit .passa e of water from the cylinder 1 to the cylinder 7, and automatically to check ow of water in the opposite direction.

The cylinder 7 is connected at each; end by passages 30 with a chamber 31 which has an outlet opening 32 through whlch water put under pressure by the operation o f the pump may be discharged and from which 1t ma be conducted to a place of use.

Fiach passage 30 is provided with a check valve 30 of such construction that water is allowed to pass freely from the cylinder 7 to the chamber 31, while the flow of water from the chamber to the cylinder is prevented.

In the operation of the pump, assuming that the parts thereof are in the positions shown in the drawing, and that water remaining from a prevlous operation is contained in the left end of the cylinder 7,

,. water under pressure admitted through the inlet port of the valve casing passes between the valve heads 33 and 34, through the ort 14, the pasage 15, and the port 16 to tiie right end bf the piston 1, and also, through the described communication to the right end of the cylinder 7. When the valve is in the osition shown a communication through tlie left port 16, -passage 15 and port 14, between the left end of the cylinder 1 and the valve casing is established between the left end of the cylinder 1 and the outlet opening 132, but passage of water from the left end of the cylinder 7, through the cylinder 1, to the va ve casing is prevented by the check valve located in the passage connecting the left end of the cylinders. Therefore, as the pressure of the admitted water is imposed upon the piston 2 and the latter is moved thereby comparatively little resistance is offered by the Water in the left end of the cylinder. By reason of the communication between the cylinders, the pressure of the water is also imposed upon the ri ht face of the iston of the cylinder 7. T e piston rods o the two cylinders being connected by the yoke 5, as described, the force exerted u on the water in the left end of the cylin er 7 is equal, less loss by friction of the' moving parts to the force exerted by the admitted water on both pistons.

Passage of water from the end of cylinder 7 at which water't'o operate the plston 8 is being admitted to the chamber 31 is prevented, because at once on the beginning of the strokes of the pistons water under pressure is forced into the chamber 31. As the pressure of the water thus forced into the chamber is much greater than that of the water by which the pistons are operated the valve 30 at the end mentioned is move to close the passage 30 and is held in that position until the end of the strokes ofzthe pistons.

In the reciprocation of the pistons the springs 24 on the valve stem are alternately compressed between the yokes and the collars on the rod, and as the pistons approach the limit of their stroke in either direction the tension of the spring compressed is suicient to shift the valve stem against the retaining action of the detent which is in engagement with one of the co1- lars having inclined faces on the rod. In the positions of the ports shown in Figure 1 water admitted to the right ends of the cylinders has moved the pistons to the left about half their strokes. When the pistons reach the left positions the right spring,

Vhaving been compressed, acts to shift the valve stem and valve tothe left to admit water from the'source of supply to the. left ends of the cylinders, and to establish a discharge conduit for the water contained in the right end of the vcylinder 1. The pressure maintained on the detents by their springs is such compared with the force exerted by the springs on the valve stem when compressed' that such force is sufficient to cause the valve stem to move and raise the detents by the action of abrupt inclines on vthe collars of the stem, and then to shift the valve. As one collar is released from its detent the opposite collar moves to receive the corresponding detent, by which it is to be yieldingly held, on its gradually inclined face and by contact with which the detent is raised without offering material resistance to the movement of the valve stem. The movement of the end of a 'detent over the abrupt inner' inclined face of a collar, when this is reached, under the impulse of the spring by which the detent is held, serves to complete the throw of the valve. Contact of a detent with this abruptly inclined face maintains the valve in the position to which it has been moved, as described, against displacement until a valveoperating spring has been put under suicient tension, by the movements of the pistons, to shift the valve stem. v

From the foregoing description it will be clear that when Water under pressure is supplied to the valve the pistons of the llt) move the piston of one ot the pistons in one4 direction will, on the movements of the pistons 1n the opposite direction, be put under a pressure corresponding to the force which the water so supplied exerts upon both pistons. The pump is capable ot many advantageous uses. F or instance, it furnishes inexpensive mea-ns for raising the water `to the upper parts of a building where the available supply is under too low pressure to serve the purpose.

lVhile I have herein specically described a pump in which two cylinders and pistons are employed, it will be clear from an understanding of the invention that any number of cylinders may be used, and thatthe power obtained as described may be concentrated upon one or more of the pistons Afor the described or for similar purposes. Also, two or more pumps may be coupled, each successive pump receiving the discharge from a preceding one, and thereby they may be compounded.

I claim:

1. An automatic pump comprising a plurality ot cylinders and pistons, means for admitting and discharging water alternately to and trom the sides of the pistons, and means where-by the force exerted by the pistous is utilized to raise the pressure of'water on one side of one of the pistons.

2. An automatic pump comprisingr a plurality of cylinders and pistons, the pistons being connected, means for admitting and discharging water alternately to and from (he sides of the pistons, and means whereby the force exerted by the pistons is utilized to raise the pressure of water on one side of one of the pistons.

3. An automatic pump comprising a plurality of cylinders and pistons, means for admitting and discharging water alternately to and from the sides of the pistons, and means whereby the force exerted by the pistous is utilized to raise the pressure of water alternately on opposite sides of one ot the pistons.

4. An automatic pump comprising a plurality of cylinders and pistons, the pistons being connected, means for admitting and discharging water to and from the sides of the pistons alternately, and means whereby t-he torce exerted by the, pistons is utilized to raise the pressure of water alternately on opposite sides of one of the pistons.

5. An automatic pump comprising a plurality of cylinders and pistons, a Valve operated by the pistons for admitting water alternately to and from opposite sides of the pistons, and means whereby the combined force 'exerted by the pistons is utilized to raise the pressure ot water on one side of one of the pistons.

6. An automatic pump comprising a plurality of cylinders and pistons', a Avalve operated by the pistons for admittingwater alternately to and from the sides of the pistons, and means whereby the combined force exerted by the pistons is utilized to raise the pressure of water alternately on the opposite sides of one of the pistons.

7. An automatic pump comprising a plurality of cylinders and pistons, a valve for admitting water alternately to and from the opposite sides of the pistons, means for operating the valve in the reciprocation of the pistons including compressible springs and detents by which the springs are controlled, and means whereby the combined force exerted by the pistons is utilized to raise the water alternately on opposite sides of one of the pistons. l

8. An automatic pump comprising a plurality of cylinders and pistons, a slide valve having ports connected with the ends of the cylinders and a discharge. port, a connection between the pistons and the Valve whereby as the pistons reciprocate the valve is operated to admit and discharge wateralternately to the opposite sides of the pistons, and means whereby water is discharged alternately from the ends of one cylinder and water is confined alternately in the ends of the other cylinder and raised in pressure by the combined force exerted by both pistons. d

9. An automatic pump comprising a plurality of cylinders and pistons, the pistons heilig connected` a slide valve by which water is admitted alternately to the opposite ends of the cylinders provided with springs contacted with and compressed by the connection between the pistons, and yieldingly held detents controlling the springs, whereby when the tension of the springs overcomes the detents the valve is operated.

In testimony whereof I affix my signature.

IVILLIAM J. SMITH. 

